LESSON 8.] 



THKIK PARTICULAU FORMS. 



59 



Auriculafe, or eared, hiivinj? a pair of Mnall and l.lunt projections, 

 or ears, at the biuse, as in one species of Maj,niolia (Fi;^- '••<>)• 



Sagittate, or arrow-shaped, where sueii eai-s are pointed and turned 

 downwards, while the 

 main body of the hhide 

 tapers upwards to a 

 point, as in the com- 

 mon Sajjittaria or Ar- 

 row-head, and in the 

 AiTow-leav(!d Polygo- 

 num (Fi;;. 95). 



Hastate, or halberd- 

 shaped, when such 95 96 st 

 lobes at the base point outwards, givinj]; the leaf the shape of the 

 halberd of the olden time, as in another Polyfjonum (Fig. 9"). 



Peltate, or shield-shaped, (Fig. 102,) is the name applied to a 

 curious modification of the leaf, commonly of a rounded form, where 

 the footstalk is attached to the lower surface, instead of the base, and 



therefore is naturally likened to a shield borne ]>y the outstretched 

 arm. The common AVatershield, the Nelumbium, and the "White 

 Water-lily, and also the Mandrake, exhibit this. sort of leaf. On 

 comparing the shield-shai)ed leaf of the common Marsh Peimywort 

 (Fig. 102) with that of another connnon species (Fig. KU), we sec 

 at once what this peculiarity means. A shield-shaped leaf is like a 



Flo. O). Sagillatp, %. aunnilnio, <r7. Iialliir.l slin|>cil, leaves. 

 FIG. 96- lOS. VariouH furiiu uf radiata-vaiiied leavea. 



